{"repo": "GoogleChrome/lighthouse", "instance_id": "GoogleChrome__lighthouse-5917", "base_commit": "3ad529d937a4aa5af4e68575c6780676edd23248", "problem_statement": "No domContentLoaded event in trace\nI'm using lighthouse for automatic page test, and I've encountered this warning, which makes the performance score very slow, could anyone help to figure out why is this happening?\n\n```\n~/dev/node-test/chrome lighthouse https://h5.m.taobao.com/trip/home/index.html\n ChromeLauncher Waiting for browser. +0ms\n ChromeLauncher Waiting for browser... +1ms\n ChromeLauncher Waiting for browser..... +515ms\n ChromeLauncher Waiting for browser.....✓ +4ms\n status Initializing… +770ms\n status Loading page & waiting for onload URL, Viewport, ViewportDimensions, ThemeColor, Manifest, ChromeConsoleMessages, ImageUsage, Accessibility, EventListeners, AnchorsWithNoRelNoopener, AppCacheManifest, DOMStats, JSLibraries, OptimizedImages, PasswordInputsWithPreventedPaste, ResponseCompression, TagsBlockingFirstPaint, WebSQL +346ms\n statusEnd Loading page & waiting for onload +14s\n status Retrieving trace +1ms\n status Retrieving devtoolsLog and network records +2s\n status Retrieving: URL +14ms\n status Retrieving: Viewport +1ms\n status Retrieving: ViewportDimensions +5ms\n status Retrieving: ThemeColor +6ms\n status Retrieving: Manifest +2ms\n status Retrieving: ChromeConsoleMessages +1ms\n status Retrieving: ImageUsage +2ms\n status Retrieving: Accessibility +59ms\n status Retrieving: EventListeners +262ms\n status Retrieving: AnchorsWithNoRelNoopener +230ms\n status Retrieving: AppCacheManifest +2ms\n status Retrieving: DOMStats +3ms\n status Retrieving: JSLibraries +15ms\n status Retrieving: OptimizedImages +9ms\n status Retrieving: PasswordInputsWithPreventedPaste +161ms\n status Retrieving: ResponseCompression +2ms\n status Retrieving: TagsBlockingFirstPaint +6ms\n status Retrieving: WebSQL +4ms\n status Loading page & waiting for onload ServiceWorker, Offline, StartUrl +811ms\n statusEnd Loading page & waiting for onload +230ms\n status Retrieving devtoolsLog and network records +47ms\n status Retrieving: ServiceWorker +7ms\n status Retrieving: Offline +0ms\n status Retrieving: StartUrl +34ms\n status Loading page & waiting for onload HTTPRedirect, HTMLWithoutJavaScript +333ms\n statusEnd Loading page & waiting for onload +179ms\n status Retrieving devtoolsLog and network records +0ms\n status Retrieving: HTTPRedirect +6ms\n status Retrieving: HTMLWithoutJavaScript +7ms\n status Disconnecting from browser... +5ms\n status Analyzing and running audits... +30ms\n status Evaluating: Uses HTTPS +0ms\n status Evaluating: Redirects HTTP traffic to HTTPS +8ms\n status Evaluating: Registers a service worker +1ms\n status Evaluating: Responds with a 200 when offline +0ms\n status Evaluating: Has a `` tag with `width` or `initial-scale` +1ms\n status Evaluating: Contains some content when JavaScript is not available +2ms\n status Evaluating: First meaningful paint +1ms\n status Evaluating: Page load is fast enough on 3G +125ms\n load-fast-enough-for-pwa:warn Caught exception: No domContentLoaded event in trace +34ms\n status Evaluating: Perceptual Speed Index +0ms\n status Evaluating: Screenshot Thumbnails +2s\n status Evaluating: Estimated Input Latency +187ms\n status Evaluating: No browser errors logged to the console +5ms\n status Evaluating: Keep server response times low (TTFB) +1ms\n status Evaluating: First Interactive (beta) +1ms\n first-interactive:warn Caught exception: No domContentLoaded event in trace +0ms\n status Evaluating: Consistently Interactive (beta) +0ms\n consistently-interactive:warn Caught exception: No domContentLoaded found in trace. +0ms\n status Evaluating: User Timing marks and measures +0ms\n status Evaluating: Critical Request Chains +11ms\n status Evaluating: User can be prompted to Install the Web App +3ms\n status Evaluating: Configured for a custom splash screen +1ms\n status Evaluating: Address bar matches brand colors +0ms\n status Evaluating: Manifest's `short_name` won't be truncated when displayed on homescreen +0ms\n status Evaluating: Content is sized correctly for the viewport +1ms\n status Evaluating: Uses Images with appropriate aspect ratio +0ms\n status Evaluating: Avoids deprecated APIs +2ms\n status Evaluating: Site works cross-browser +0ms\n status Evaluating: Page transitions don't feel like they block on the network +0ms\n status Evaluating: Each page has a URL +0ms\n status Evaluating: `[accesskey]` values are unique. +0ms\n status Evaluating: `[aria-*]` attributes match their roles. +1ms\n status Evaluating: `[role]`s have all required `[aria-*]` attributes. +0ms\n status Evaluating: Elements with `[role]` that require specific children `[role]`s, are present. +0ms\n status Evaluating: `[role]`s are contained by their required parent element. +0ms\n status Evaluating: `[role]` values are valid. +0ms\n status Evaluating: `[aria-*]` attributes have valid values. +0ms\n status Evaluating: `[aria-*]` attributes are valid and not misspelled. +0ms\n status Evaluating: `